Millibar

Millibar, unit of air pressure in the metric system, commonly used in meteorology, equal to 100 pascals, 1,000 dynes per square cm (about 0.0145 pounds per square inch), or slightly less than one-thousandth of a standard atmosphere.

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...literature. The atmosphere (atm; approximately 1.034 kilograms per square centimetre [14.7 pounds per square inch], equivalent to the weight of about 760 millimetres [30 inches] of mercury) and the bar (equivalent to one kilogram per square centimetre) are often cited. Coincidently, these units are almost identical (1 bar = 0.987 atm). The pascal, defined as one newton per square metre (1 Pa =...

English meteorologist whose introduction of the millibar, a unit of measurement of air pressure, and the tephigram, a graphical representation of the first law of thermodynamics as applied to Earth’s atmosphere, contributed to the development of modern meteorology.